Ehong EH-MB05 Скачать руководство пользователя страница 19 | Manualshive

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Ehong EH-MB05 Скачать руководство пользователя страница 19

Bluetooth Audio Module

6.7.3 IEC 60958 Interface (SPDIF)

Through AT+ command  to switch if SPDIF is  used.The IEC 60958 interface is a digital  audio
interface that uses bi-phase  coding to minimise the DC content  of the transmitted signal and
allows the receiver to decode the clock information from the transmitted signal. The IEC 60958
specification is based on  the 2 industry standards:

■
■

AES/EBU
Sony and Philips interface specification SPDIF

The interface is compatible  with IEC 60958-1, IEC 60958-3 and IEC  60958-4.
The SPDIF interface signals  are SPDIF_IN and SPDIF_OUT and  are shared on the PCM
interface pins. The input  and output stages of the SPDIF pins can  interface to:

■ A 75Ω coaxial cable with an RCA connector, see Figure 11.
■ An optical link that uses Toslink optical components, see Figure 12.

Figure 11: Example Circuit for SPDIF Interface (Co-Axial)

Shanghai Ehong Technologies Inc

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Содержание EH-MB05

Страница 1: ...nd AT command over UART Firmware upgrade over USB With SPP service active 560kbps transmission speed UART PCM interface I2S SPDIF I2C interface Master Audio codec 16bit internal stereo codec 95dB SNR...

Страница 2: ...ter 7 Internal CODEC Digital to Analogue Converter 8 5 6 Pinout and Terminal Description 9 5 1 Pin assignment 9 Physical Interfaces 11 6 1 Power Supply 11 Reset 12 PIO 12 AIO 12 UART 13 I2C Master 13...

Страница 3: ...MPONENT VALUES 22 3 Table of Figures FIGURE 1 P I NOUT OF EH MB05 9 FIGURE 2 P OW ER SUPPLY PCB DESIGN 11 FIGURE 3 C O NNECTION TO HOST DEVICE 13 FIGURE 4 EXAMPLE EEPROM CONNECTION WITH I2C INTERFACE...

Страница 4: ...riendly interface Supportdifferent Bluetooth profiles such as SPP A2DP AVRCP HFP HID iAP and etc iAP over Bluetooth using apple s authentication coprocessor Customers using the Apple authentication IC...

Страница 5: ...Voltage 1 57 3 6 V VDD Voltage V RF frequency 24800 MHz Table 1 Recommended Operating Conditions 4 2 Absolute Maximum Rating Rating Min 40 Max 125 85 Unit C C V Storage Temperature Operating Temperat...

Страница 6: ...link is being treated as a scatter net link or is absent due to hold mode With sniff mode the time slots when a slave is listening are reduced so the master shall only transmit to a slave in specified...

Страница 7: ......

Страница 8: ...tput Sample Rate Fsample fin 1kHz 8 48 kHz Fsample 8kHz 95 95 95 95 95 95 95 B W 20Hz 20kHz 11 025kHz 16kHz Signal to Noise Ratio SNR A Weighted THD N 0 01 0dBFS signal Load 100k 22 050kHz 32kHz dB 44...

Страница 9: ...pull down Serial Peripheral Interface output for programming only CMOS input with weak internal pull down Serial Peripheral Interface input for programming only Chip select for Synchronous Serial Int...

Страница 10: ...Ground GND MIC_LP MIC_LN SPK_LN SPK_LP SPK_RN SPK_RP Analogue Analogue Analogue Analogue Analogue Analogue Microphone input positive left Microphone input negative right Speaker output negative left S...

Страница 11: ...wn Bi directional with 41 42 PIO7 PIO6 programmable strength internal pull up down Programmable input output line Programmable input output line Bi directional with programmable strength internal pull...

Страница 12: ...PD PU PD PD PU PD PU PD PD PD PD PD USB_DN UART_RX UART_TX SPI_MOSI SPI_CLK SPI_CSB SPI_MISO RESETB PIOs PCM_IN PCM_CLK PCM_SYNC PCM_OUT Table 9 Pin Status on Reset 6 3 PIO EH MB05 has a total of 11 d...

Страница 13: ...200 baud 2 Error 9600 baud 1 Error 3M baud 1 Error RTS CTS or None None Odd or Even 1 or 2 Minimum Maximum Baud Rate Flow Control Parity Number of Stop Bits Bits per Byte 8 Table 10 Possible UART Sett...

Страница 14: ...1 Apple iOS CP reference design The figures below give an indicative overview of what the hardware concept looks like A specific MFI co processor layout is available for licensed MFI developers from...

Страница 15: ...and recording of audio signals at multiple sample rates with a resolution of 16 bit The ADC and the DAC of the codec each contain 2 independent channels Any ADC or DAC channel can be run at its own i...

Страница 16: ...lave accepting externally generated PCM_SYNC and PCM_CLK EH MB05 is compatible with a variety of clock formats including Long Frame Sync Short Frame Sync and GCI timing environments It supports 13 bit...

Страница 17: ...Frequency 6 2 WS Frequency 96 tch tcl SCK high time 80 80 SCK low time ns topd tssu tsh tisu tih SCK to SD_OUT delay WS to SCK set up time WS to SCK hold time SD_IN to SCK set up time SD_IN to SCK hol...

Страница 18: ...6 2 96 20 20 Unit MHz kHz ns SCK Frequency WS Frequency topd tspd tisu tih SCK to SD_OUT delay SCK to WS delay ns SD_IN to SCK set up time SD_IN to SCK hold time 20 10 ns ns Table 13 Digital Audio In...

Страница 19: ...ation is based on the 2 industry standards AES EBU Sony and Philips interface specification SPDIF The interface is compatible with IEC 60958 1 IEC 60958 3 and IEC 60958 4 The SPDIF interface signals a...

Страница 20: ...ngle Channel Shown The audio input is intended for use in the range from 1 A 94dB SPL to about 10 A 94dB SPL With biasing resistors R1 and R2 equal to 1k this requires microphones with sensitivity bet...

Страница 21: ...tible digital devices The module acts as a USB peripheral responding to request from a master host controller such as a PC The USB interface is capable of driving a USB cable directly No external USB...

Страница 22: ...ace Component Values Note USB_ON is only used when the firmware need an input to detect if USB is connected and the USB function shall be enabled In such case it is shared with the module PIO terminal...

Страница 23: ...Bluetooth Audio Module 7 EH MB05 Reference Design Figure 17 Reference Design Shanghai Ehong Technologies Inc...

Страница 24: ...on 0 02mm TOP View 9 RF Layout Guidelines EH MB05 has an on board PCB antenna PCB design to ensure enough clearance area of antenna area length is 1 6 times of antenna length area width is 4 times of...

Страница 25: ...ne as curve lines when needed avoid 90 or even less degree angles style The width of the feed line the distance of the feed line to the ground plane are keys to the impedance Ask your PCB supplier to...

Страница 26: ...ries covers connectors etc affect the antenna performance This is the reason why it is highly recommended to place 0402 pads for a PI matching network as close as possible to the antenna feeding point...

Страница 27: ...tivator and rosin get activated and start eliminating oxide film formed on the surface of each solder particle and PCB board The temperature is recommended to be 150 to 210 for 60 to 120 second for th...

Страница 28: ...ns limiting both maximum RF output power and human exposure to RF radiation maximum antenna gain including cable loss must not exceed Bluetooth 4 0 dBi 3 This device complies with part 15 of the FCC R...

Страница 29: ...to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device The users manual or instruction manual for a...

Страница 30: ...isted as a Limited Modular Transmitter device Therefore the final host product must be submitted to ShangHai Ehong Technology Co Ltd for confirmation that the installation of the module into the host...

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